<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src alt />
        <span>管理后台</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollpse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          :collapse="isCollapse"
          router
          :collapse-transition="false"
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>

            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/'+subitem.path"
              v-for="subitem in item.children"
              :key="subitem.id"
              @click="saveNavState('/'+subitem.path)"
            >
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subitem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view name="main"></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menulist: [
        {
          id: 1,
          authName: "用户管理",
          path: "users",
          children: [
            {
              id: 11,
              authName: "用户列表",
              path: "admin/users",
              children: [],
              order: null
            }
          ],
          order: 1
        },
        {
          id: 2,
          authName: "评论管理",
          path: "admin/rights",
          children: [
            {
              id: 21,
              authName: "所有评论",
              path: "admin/roles",
              children: [],
              order: null
            }
          ],
          order: 2
        },
        {
          id: 3,
          authName: "文章管理",
          path: "articles-manager",
          children: [
            {
              id: 31,
              authName: "所有文章",
              path: "admin/all-articles",
              children: [],
              order: 1
            },
            {
              id: 32,
              authName: "添加文章",
              path: "admin/add-articles",
              children: [],
              order: 1
            },
            {
              id: 33,
              authName: "修改文章",
              path: "admin/revise-articles",
              children: [],
              order: 2
            },
            {
              id: 34,
              authName: "分类文章",
              path: "admin/classified-articles",
              children: [],
              order: 2
            }
          ],
          order: 3
        },
        {
          id: 4,
          authName: "数据统计",
          path: "reports",
          children: [
            {
              id: 51,
              authName: "数据报表",
              path: "admin/reports",
              children: [],
              order: null
            }
          ],
          order: 5
        }
      ],
      iconsObj: {
        "1": "iconfont icon-user",
        "2": "iconfont icon-tijikongjian",
        "3": "iconfont icon-danju",
        "4": "iconfont icon-baobiao"
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ""
    };
  },
  methods: {
    logout() {
      window.sessionStorage.clear();
      this.$router.push("/admin-login");
    },
    created() {
      this.activePath = window.sessionStorage("activePath");
    },
    //点击按钮切换和展开
    toggleCollpse() {
      this.isCollapse = !this.isCollapse;
    },
    saveNavState(activePath) {
      window.sessionStorage.setItem("activePath", activePath);
      this.activePath = activePath;
    }
  }
};
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}

.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}

.el-main {
  background-color: #eaedf1;
}

.iconfont {
  margin-right: 10px;
}

.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
